“…Deep hypothermia, with or without cardiocirculatory arrest, has been used for treating thoracic and thoracoabdominal aortic aneurysms and has been performed by establishing extracorporeal circulation between the aortic arch and right atrium 22,23,25,26 . In this study, deep internal hypothermia was induced by establishing extracorporeal circulation between the left atrium and the ascending aorta through the left auricle, because it provides more space for acting on the aneurysms of the aortic arch, mainly when those aneurysms are close to the subclavian artery, or yet, due to the large diameter of the descending aorta.…”